BILL

Sr. Staff AI Security Engineer

BILL
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20 hours ago
Draper, UT, USA or San Jose, CA, USAStaff+

Base Salary

$165k - $243k/yr

Responsibilities

  • Design, build, and operate secure AI gateways and policy orchestration layers spanning multiple AI models and service providers.
  • Configure endpoint settings for AI tools in collaboration with IT endpoint management solutions.
  • Establish and lead a formal AI red-teaming practice covering prompt injection, jailbreaking, model extraction, and emerging attack vectors.
  • Identify and mitigate AI-specific threats involving input manipulation, model and data supply chains, privacy, poisoning, and unauthorized fine-tuning.
  • Automate security checks and guardrails for rapid AI development cycles.
  • Apply the OWASP LLM Top 10 framework to categorize and mitigate risk.
  • Own the AI security roadmap and advise senior leadership on AI risks and safe adoption.
  • Partner with platform teams to embed security into the AI development lifecycle.
  • Mentor engineers on AI security best practices.
  • Document vulnerabilities and provide clear remediation guidance and technical direction.

Requirements

  • Proven experience building and scaling security systems in high-growth environments.
  • High proficiency in Python or Go for building, automating, and scaling security tooling.
  • Deep understanding of LLM-specific attack vectors, including prompt injection and jailbreaking.
  • Deep understanding and applied experience with the OWASP LLM Top 10 framework.
  • Experience designing secure API gateways, orchestration layers, and scalable security infrastructure using infrastructure as code.
  • Experience establishing red-teaming or adversarial testing programs.
  • Strong understanding of AI/ML fundamentals, model supply chain risks, and data privacy risks.
  • Ability to influence senior leadership and mentor engineers across the organization.
  • Builder mentality and passion for enabling AI development through secure architecture.
  • Background in Computer Science, Cybersecurity, or a related technical field.

Benefits

  • Remote-first work environment with office spaces in San Jose, California, and Draper, Utah, plus opportunities for in-person collaboration.
  • Medical, dental, and vision plans, including HMO, PPO, and HDHP options.
  • Health savings and flexible spending accounts.
  • Life insurance and long- and short-term disability coverage.
  • Employee Assistance Program.
  • 11 or more observed holidays, wellness days, and flexible time off.
  • Employee Stock Purchase Program with employee discounts.
  • Wellness and fitness initiatives, employee recognition programs, referral programs, and other benefits.

Tech Stack

Categories

BILL

About BILL

1,001-5,000 employees

BILL builds cloud software that automates payables, receivables, and spend/expense workflows for small and midsize businesses and accounting firms, with integrations to QuickBooks, NetSuite, and Intacct. Its model combines SaaS subscriptions with payment processing and card interchange fees across its B2B payments network. Publicly traded on the NYSE (BILL) and headquartered in San Jose, it was founded in 2006 and expanded with the Divvy and Invoice2go acquisitions.

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